Stenciling-machine.



No. 889,876. 4 PATENTED JUNE 2, 1908. c. GIBBS. STBNGILING MACHINE.

APPLICATION FILED no.8. 1907.

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HARLES GIBBS, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY,

I OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

STE N'GILING-MACHINE Application filed December 2, 1907.

T 0 all whom it may concern:

Be it known that I, CHARLES GIBBS, a citizen of the United States, residing in borough of Bronx, city of New York, in the county of New York and State of New York,

have invented certain new and useful Improvements in Stencilingdvlachines, of which the following is a specification.

This invention relates to stenciling machines of the class in which ink is applied within the interior of a perforated cylinder and oozes through the perforations, and is taken up by an ink blanket which is wrapped around the cylinder, and from thence is pressed through a perforated stencil sheet upon the sheets to be stenciled. Heretofore, a stencil cylinder of this class has been mounted wholly upon one end, leaving the other end open for the introduction and manipulation of an inking implement. A stop arm has been secured upon the open end of the cylinder for determining the initial or sheet receiving position thereof, and a handle has usually been provided upon said stop arm.

One of the main objects of my invention is to avoid the necessity of providing a stop arm and handle upon the end of the cylinder, as it is liable to be in the way when inking the cylinder or when detaching the latter for cleaning, and as it has to be turned backwardly when running the sheets through the machine.

In carrying out my invention, I provide a gear upon the closed end of the cylinder and also a second gear to mesh with the first, and the second gear I secure upon a shaft which extends along the cylinder, and is provided with a handle near the open end of the latter. In operating the machine, this handle is turned in the opposite direction, which is an advantage to the operator; and when detaching the cylinder, the handle is left upon the machine, thus making it more convenient to manipulate, clean and replace the cylinder. It also avoids liability of injury to the single bearing of the cylinder, owing to the wrenching effect which may be produced thereon by a careless operator in pressing on a handle that is attached directly to the unsupported end of the cylinder.

In the accompanying drawings, Figure 1 is a front elevation of sufficient of a stenciling machine to illustrate my improvements.

Specification of Letters Patent.

Patented June 2, 1908.

Serial No. 404,756.

Fig. 2 shows an axle employed to journal the cylinder, and a nut for securing the axle upon the machine. Fig. 3 is a longitudinal sectional View of the machine. Fig. 4 shows the cylinder and axle detached from the machine for the purpose of cleaning. Fig. 5 shows in section the standard upon which the cylinder is journaled. Fig. 6 is an elevation of one end of the machine omitting the gears. Fig. 7 is a detail of the manner of keying a gear to the detachable cylinder axle. Fig. 8 is an elevation showing the other end of the machine from Fig. 6. Figs. 9, 10 and 11 show the details of the stop arm connected to the cylinder. Fig. 12 is a view like Fig. 6, but on an enlarged scale and showing the gears.

The cylinder 1, having the usual perforations 2 and entirely open at the end marked 3, is mounted by means of an axle 4 upon a horizontal boss or stud 5 integral with or otherwise fixed upon a standard 6 rising from the base 7 of the framework. The axle extends through a bore 8 formed in the boss 5, the latter extending within a hollow internal hub 9 which extends inwardly from the closed end 10 of the cylinder, the boss 5 being preferably out of contact with said hub, so as to give a clearance 11. The inner end of the hub is closed at 12 and perforated at 13 to receive the inner end of the axle 4, a nut 14 being threaded upon said end of the axle to draw a flange 15, formed u on the axle, against the hub 12, thereby to old the cylinder rigid with the axle. The cylinder and axle may be detached together from the machine, Fig. 4. Upon the other end of the shaft is formed a shoulder 16, and a gear 17, keyed at 18 upon the reduced end of the shaft, is pressed against said shoulder by a thumb nut 19. The reduced end of the shaft projects from the boss 5. When it is desired to detach the cylinder, it is only necessary to unscrew the thumb nut 19 and take off the gear 17 when the cylinder and axle may be drawn away. In mesh with said gear is a sec- 0nd gear 20 of the same size, and mounted upon a horizontal shaft 21; said gears being upon'one side and the cylinder upon the other side of the standard 6. along the cylinder 1, and at its other end is j ournaled in a standard 22 rising from the base 7. Upon a projecting end of the shaft 21 is fixed a collar 23. arm 24 is loosely jour- The shaft 21 extends naled upon the .end of the shaft 21 outside of said axle, and has a disk-like hub 25 to press against the collar or disk 23. Hooks 26 catching over the disk 23, are drawn by nuts 27 to clamp the hub 25 against the disk. By I loosening said nuts the stop arm 24 may be adjusted around the shaft 21, and may be secured wherever it is set by means of said nuts 27. A stop 28 upon the framework 22 cooperates with the stop arm 24 to determine the initial position of the cylinder, so that a sheet inserted at this time between the cylinder and the usual pressure roll 29, Fig. 12, will become stenciled in the desired place on the sheet. A handle 30 is provided upon the arm 24, and it will be understood that the latter is turned in the natural direction or to the right at Fig. 8, While the cylinder 1 revolves to the left to stencil the sheets 31, as indicated by the arrows. When the handle 30 is turned to the right, a bevel 32 thereon forces the stop 28 out of the way, but a spring 38 presses the stop out again after the arm 24 passes, and the latter is then pressed back against the stop to starting position, Fig. 8. 4

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a stenciling machine, the combination with a frame and a stencil cylinder entirely open at one end, of a gear upon the other end of the cylinder, and a shaft extending along the cylinder and carrying at one end a handle and a stop and at the other end a second gear in mesh with said gear and of the same diameter as the latter; a cooperating stop being provided upon the framework.

2. In a stenciling machine, the combination with a frame and a stencil cylinder entirely open at one end, of a gear upon the other end of the cylinder, the latter supported only at its rear end, and a shaft extending along the cylinder and carrying at one end a handle and stop and at the other end a second gear in mesh with said gear.

3. In a stenciling machine, the combination with a frame and a stencil cylinder entirely open at one end and having at the other end an axle whereby it is wholly supported upon the frame, of a ear upon said axle, and a shaft extending a ong the cylinder and carrying at one end a handle and at the other end a second gear in mesh with said gear; the axle being ournaled in a boss provided upon the framework, and the gear being mounted upon an end of said axle which projects from the boss.

4. In a stenciling machine, the combination with a frame having at one end a standard, of an axle journaled in said standard and projecting at its outer end from said standard, a stencil cylinder open at one end and at the other end having any internal hub secured to said axle, and drivingmeans upon said projecting end of said axle.

5. In a stenciling machine, the combination with a frame having at one end a standard, of an axle ournaled in said standard and projecting at its outer end from said standard, a stencil cylinder open at one end and at the other end having an internal hub secured to said axle, a gear upon said projecting end of said axle, and a shaft extending along the cylinder and carrying at one end a handle and at the other end a second gear in mesh with said gear.

6. In a stenciling machine, the combination with a frame Work having a standard provided with a boss or stud, of an axle extending through said boss, a stencil cylinder open at one end and having at the other end a hollow internal hub surrounding said boss and fixed upon the inner end of said axle, and means to retain the axle upon said standard.

7 In a stenciling machine, the combination with a framework having a standard provided with a boss or stud, of an axle extending through said boss, a stencil cylinder open at one end and having at the other end a hollow internal hub surrounding said boss and fixed upon the inner end of said axle, and means to retain the axle detachably upon said standard, so that the cylinder and axle may be drawn off together.

8. In a stenciling machine, the combination with a framework having a standard provided with a boss or stud, of an axle v extending through said boss, a stencil cylinder open at one-end and having at the other end a hollow internal hub surrounding said boss and fixed upon the inner end of said axle, and means to retain the axle detachably upon said standard so that the cylinder and axle may be drawn off together; said retaining means including a thumb-nut threaded upon the outer end of the axle.

9. In a stenciling machine, the combination with a framework having a standard provided with a boss or stud, of an axle extending through said boss, a stencil cylinder open at one end and having at the other end a hollow internal hub surrounding said boss and fixed upon the inner end of said axle, and means to retain the axle detachably upon said standard so that the cylinder and axle may be drawn off together; said retaining means including a thumb-nut threaded upon the outer end of the axle; a gear keyed to the end of the axle and retained thereon by said nut, and a shaft extending along the cylinder and having at one end a handle and at the other end a gear to mesh with said ear.

I 10. In a stenciling machine, the combination of a stencil cylinder open at one end and having at the other end an interior hollow hub, an axle within said hub and secured at its inner end to the hub, and a boss provided upon the framework and extending within said hub the axle being journaled in said boss.

11. A stencil cylinder open at one end and having at the other end an interior hollow hub, and an axle within said hub and rigidly secured at its inner end to the inner end of the hub; the other end of the axle extending out from the cylinder and threaded to receive a securing nut.

12. In combination, a stencil cylinder open at one end and having at the other end an interior hollow hub, an axle within said hub and rigidly secured at its inner end to the inner end of the hub, and a frame provided with a standard and having a boss or stud extending within said hub, and having a bore to receive said axle.

13. A stenciling machine comprising a stencil cylinder open at one end and having at the other end an interior axle; and a framework having means extending within the cylinder to support said cylinder wholly by means of said axle; the cylinder and axle being detachable together from the frame- Work.

14. In a stenciling machine, the combination with a frame and a stencil cylinder entirely open at one end, of a gear upon the other end of the cylinder, the latter supported only at its gear end, a sha'ft extending along the cylinder and carrylng at one end a handle and stop and at the other end a second gear in mesh with said gear; said stop being adjustable about said shaft to vary the initial position of the cylinder; a cooperating stop upon the framework, and a roll to press the sheets against said cylinder.

15. A stenciling machine, comprising a framework having a standard, a stencil cylinder on one side of said standard and entirely open at one end and at the other end wholly supported upon said standard, a gear upon the other side of said standard and rigidly connected to said cylinder, a shaft extending along said cylinder to the open end thereof and having on one end a stop arm and handle, and a second gear upon the other end of said shaft and meshing with the first gear.

CHARLES GIBBS. Witnesses:

KITTIE FRANKFORT, J OI-IN O. SIEFERT. 

